Device and method for advancement treatment of printing and dyeing wastewater

Abstract

The invention discloses a device for advancement treatment of printing and dyeing wastewater, aiming to solve the technical problems of water consumption, high cost and secondary pollution of the device and method for treating the printing and dyeing wastewater in the prior art. The device comprises a biological active-carbon water treatment device, the biological active-carbon water treatment device is connected with a biochemical settling pond which is connected with a reverse ore sand filter pool, and the reverse ore sand filter pool is connected with a clear water pool. The invention further discloses a method advancement treatment of the printing and dyeing wastewater. The printing and dyeing wastewater can be recycled for production after being subjected to the advanced treatment in the invention, so that zero emission is realized. The printing and dyeing wastewater treated by using the device and method disclosed by the invention not only can reach the requirement on recycling but also has the operation cost being 50% lower than the industrial water, and the operation cost is 0.5RMB per ton of water.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a wastewater treatment device and method, in particular to a printing and dyeing wastewater advanced treatment device and method. Background technique [0002] The printing and dyeing industry is a large water consumer. The amount of wastewater discharged and the total amount of pollutants rank the second and fourth in the national industrial sector respectively. It is one of the key polluting industries in my country. It has become the focus and difficulty of wastewater treatment process research. At the same time, with the rapid development of my country's economy, the shortage of water resources has become a limiting factor restricting the further development of my country's printing and dyeing industry. In order to achieve the sustainable development of the printing and dyeing industry, the recycling of printing and dyeing wastewater has become the key to achieve this ...

AI Technical Summary

Problems solved by technology

Since the particle size of the upper layer of the graded filter layer is small, while the particle size of the lower layer is larger, for the hydraulic conditions of downward flow filtration, a large amount of iron and manganese oxides will quickly deposit on the upper part of the filter layer. As a result, the adsorption capacity is reduced, the interception capacity of the filter layer is reduced, and the head loss increases rapidly. Moreover, the number of biological bacteria artificially inoculated in the graded filter material layer is limited. The establishment of the biochemical capacity of the entire filter layer is mainly Relying on the self-reproduction of bacteria in the filter layer, but because the blockage of the upper part of the filter layer cuts off the downward penetration path of bacteria, the bacterial proliferation in the entire filter space is hindered, so the filter layer culture period of the traditional sand filter is relatively long

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